The use of graphite electrodes: used in steelmaking electric arc furnaces, refining furnaces, as conductive electrodes; used in industrial silicon furnaces, yellow phosphorus furnaces, corundum furnaces, etc., as conductive electrodes. The performance of graphite electrodes: good electrical conductivity; strong thermal shock resistance; high mechanical strength.
(1) For electric arc steelmaking furnace: Electric furnace steelmaking is a major user of graphite electrodes. my country’s electric furnace steel production accounts for about 18% of crude steel production, and graphite electrodes for steelmaking account for 70% to 80% of the total graphite electrode consumption. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace, and uses the high-temperature heat source generated by the arc between the electrode end and the charge to carry out smelting.
(2) Used in submerged thermal electric furnaces: submerged thermal electric furnaces are mainly used for the production of industrial silicon and yellow phosphorus, etc., which are characterized in that the lower part of the conductive electrode is buried in the charge, forming an arc in the charge layer, and using the resistance of the charge itself. The thermal energy is used to heat the charge, and the submerged arc furnace that requires a higher current density needs to use graphite electrodes. For example, about 100kg of graphite electrodes are consumed for each production of silicon, and about 40kg of graphite electrodes are consumed for each production of 1t of yellow phosphorus. (3 For resistance furnaces: graphitization furnaces for the production of graphite products, melting furnaces for melting glass, and electric furnaces for the production of silicon carbide are all resistance furnaces. The materials in the furnace are both heating resistors and heated objects. Usually, conductive The graphite electrode used is embedded in the burner wall at the end of the resistance furnace, and the graphite electrode used for this is consumed discontinuously. (4) For the preparation of special-shaped graphite products: the hair of the graphite electrode is also used for processing into various storage yards, Special-shaped graphite products such as moulds, boat blood, and heating elements. For example, in the quartz glass industry, 10 tons of graphite electrode blanks are needed for every 1 ton of electric fusion tube produced; 100 kg of bad graphite electrode materials are needed for every 1 ton of quartz brick produced.